How to get PID of shell running in a terminal window under mouse?

Question

Though similar questions asked before in this forum here , here and here, my question is different. I want to get PID of a running bash process in gnome terminal.

Note: Suggested link which posted by moderators doesn't provide any working solution. I don't understand people ignorantly vote for closing my topic.

Commands like

 xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd
 xprop _NET_WM_PID | cut -d' ' -f3

give me only gnome-terminal parent PID not bash process ID

If I run

 PID=$$; echo $PID

or

 cut -d ' ' -f 4 /proc/self/stat

gives me exact PID of terminal but I have to run those commands in terminal to get the PID.

I have a script that toggles process of a terminal between kill -STOP PID and kill -CONT PID with a shortcut key combination.

    #!/bin/bash
    myid=$(ps $(xdotool getwindowfocus getwindowpid) |tail -n 1 |awk '{print $3}')
    if [[ $myid == "Sl" ]]
    then
    kill -STOP `xdotool getwindowfocus getwindowpid`
    else
    kill -CONT `xdotool getwindowfocus getwindowpid`
    fi

As I mentioned the line myid=$(ps $(xdotool getwindowfocus getwindowpid) |tail -n 1 |awk '{print $3}')

returns only PID of parent gnome-terminal

Is there a way to achieve what I want? `

EDIT: Beside Dmitry Alexandrov's answer, I also found another working solution here How to know the pid of active window

EDIT2: I spoke too early. I don't know why but above solution is not working reliably. So I am using Dmitry Alexandrov's solution, it works well except a glitch in my script.

   #!/bin/bash
   read __ __ TERM_PID < <(xprop _NET_WM_PID) &&\
   SH_PID=$(ps --ppid "$TERM_PID" -o pid=)
   mypid=$(echo $SH_PID | awk  ' { print $2 } ' )
   myid=$(ps $mypid |tail -n 1 |awk '{print $3}')
   if [[ $myid == "Sl" ]]
   then
   kill -STOP $mypid
   else
   kill -CONT $mypid
   fi
Note: Process STAT is not reliable, it doesn't always toggle between Sl and T, it sometimes takes different states such as `Ss+` `S<` 

EDIT3:

This one works well

   #!/bin/bash
   read __ __ TERM_PID < <(xprop _NET_WM_PID) &&\
   SH_PID=$(ps --ppid "$TERM_PID" -o pid=)
   mypid=$(echo $SH_PID | awk  ' { print $2 } ' )
   myid=$(ps $mypid |tail -n 1 |awk '{print $3}')
   if [[ *$myid* == *"S"* ]]
   then
   kill -STOP $mypid
   else
   kill -CONT $mypid
   fi

Answer 1

If terminal has only one shell process, I cannot see a problem.

read __ __ TERM_PID < <(xprop _NET_WM_PID) &&\
SH_PID=$(ps --ppid "$TERM_PID" -o pid=)
kill -STOP "$SH_PID"

Works for XTerm, should work for GNOME Terminal too, I believe.

Otherwise – if there may be more than one shell running under single terminal process (in several windows, tabs, regions, via multiplexer, etc), it’s not clear from the question, what do you want.